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We're looking to use some of the H-bridge parts such as VNH7070AY or VNHD7008/7012AY for PWM motor control and have an input usage question.

IWyli.1
Associate II

‎2021-11-09 04:28 AM

I can see that the datasheets and app notes say that the PWM input can operate at up to 20kHz PWM frequency, but I can't see anywhere anything that discusses using a PWM signal on the INA and INB inputs. Can we apply a 20kHz PWM signal to these inputs, or do they have a much lower operating frequency as they are intended for direction control only?

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2 REPLIES 2
IWyli.1
Associate II

‎2021-11-15 02:40 AM

Hello ST folks - can anyone please help with this?

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IWyli.1
Associate II

‎2021-11-16 04:01 AM

Don't worry - I've now answered this question, around 3kHz.

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